Automatic feeder for stamp-mills



No. 609,425. Patented Aug. 23, I898. P. W. GATES.

AUTOMATIC FEEDER FOR STAMP MILLS.

(Application filed Apr. 80, 1897.) (N 0 HI 0 d el.)

3 Sheets-Sheet I.

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No. 609,425. Patented Aug. 23, I898. P. W. GATES. AUTOMATIC FEEDER FOR STAMP MILLS.

(Application filed Apr. 30, 1897.1

3 Sheets-Sheet 2.

(No Modal.)

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No. 609,425. Patented Aug. 23, I893. P. W. GATES.

AUTOMATIC FEEDER FOR STAMP MILLS.

' Application filed Apr. 30, 1897.} (No Model.)

3 Sheets-Sheet 3.

PH/LETUS V. G ES.

Miran .rarns A'IENT Prion.

PIIILErus WARREN GATES, oFoI'IIoAe o, ILLINOIS, ASSIGNOR TO THE GATES IRON WORKS, on ILLINOIS.

AUTOMATIC FEEDER FOR STAMP-MILLS.

- SPECIIFICA'IION forming part of Letters Patent No. 609,425, dated August 23, 1898. Application filed April 30, 1897- Serial No. 684,567. (No model.)

combinations, and details of construction hereinafter described andclaimed.

In the accompanying drawings, Figure 1 is a side elevation of my improvement attached to a portion of a mill; Fig. 2, a front view of the same, partly in section; Fig. 3, a plan view of the feeder with the stamp-stem and cylinder-supports shown in section and the tappet-collars shown in dotted lines; Fig. 4, a plan view of the oscillating plate, and Fig. 5 a rear view of the same. I

In the art to which this invention relates it is well known that it is desirable to provide feeding mechanism for the automatic feeding of ore or other materials into the mortar of the stamp-mill, according to the quantity of the material therein-that is, if the layer of material being stamped is of minimum thickness the feeding of the material into position will be uniform and will vary until it exceeds a certain predetermined thickness, when the feeding will automatically cease until the layer falls below the predetermined thickness.

The object of my invention, therefore, is to provide a simple, economical, and efficient mechanism that will attain these results; and the invention consists in .the features, combinations, and details of construction hereinafter described and claimed.

In illustrating and describing my improve ment I will only illustrate and describe those portions which I consider to be new, taken in connection with so much that is old as will enable those skilled in the art to practice the same, leaving out of consideration other and well-known mechanisms, which, if described here, would only tend to confusion and ambiguity.

In constructing a machine in accordance with my improvements I make a frame portion A and secure it to the back part of the mortar B in any desired manner, preferably by means of bolts and nuts I), as shown in the drawings. To hold and sustain the material to be fed into the machine, I provide a feeding oscillating plate O, which is provided with a curved bottom portion 0, having end portions terminating in gudgeons D, by which the plate is pivoted to and oscillated in the frame portion. This oscillating feeding-plate is further provided with an integral lever E, having a projecting downward leg F.

To impart the necessary vibratory motion to the oscillating feeding-plate, a standard G is provided and secured in any desirable manner to the frame portion. In this standard I pivot an actuating-lever H, which has its free end projecting under the reciprocating parts of the stamp and arranged to be contacted by a tappet-collar 1, arranged 011 the pistonrod I of the stamp-mill. The other end of this actuating-lever is provided with a connecting-rod J, which is adjustably connected with the actuating-lever and pivotally connected at j with the lever-arm of the oscillatin g feeding-plate.

To normally hold the oscillating feedingplate against the movements of the lever, or, in other words, to thrust it forward in opposition to the movements of the actuating-lever, a helical coiled spring K is provided, which is pivot-ally secured to the lever at 70 and adjustably secured to the mortar by means of a tie-bolt 7a. A set-screw H is adj ustably secured to some portion, preferably one of the pillars 1 of the stamping-mill to limit the return motion of the actuating-1e ver, as will be hereinafter more fully described.

To supply the oscillating feeding-plate with the proper amount of ore or other materiaha hopper L is provided, having'side plates L and a bottom plate L that extends out to about the center of thecurved bottom of the oscillating feeding-plate and is prefe rably provided at its lower end with an adjustable plate Z for the purpose of obtaining the correct amount of clearance. The opposite or rear side of the hopper is provided with a short adjustable portion L, having a handle L, by which the opening below the lower portion thereof, as at L may be regulated, so as to govern the amount of material fed onto the oscillating feeding-plate.

The operation is as follows: The hopper is filled with ore and the slide L raised the desired amount. so as to allow the material to pile up on the curved plate 0 to the front edge or nearly so. The position of the actuating-lever is then adjusted by means of the set-screw H, so that a minimum amount or thickness of the layer of material on the die of the mortar may be provided. The reciprocation of the piston-rod causes the tappet collar to impinge against the actuating-lever and vibrate the feeding-plate in such a manner that material is fed over the edge a into the mortar. As the material piles up on the mortar bed or die it will soon become so,

thick that the stamp cannot pulverize it as fast as it is being fed in. When it reaches this point, which generally can be predetermined, the tappet-collar will cease to strike this actuating-lever, and as a consequence the feeding in of the material will cease until the layer of the material on the die-bed falls below the predetermined thickness. The thickness of the layer of material on the die or mortar-bed can be regulated by adj usting the tappet-collar L, so that it will strike 3 the actuating-lever early in its movements, or the set-screw H can be moved up, so as to permit the actuating-lever to have a longer range of' action.

I claim- In an oscillating feeder for stamp-mills, the combination of an oscillating feeding-plate provided with acurved bottom portion, ahopper having its inclined bottom terminating at or about the center of the oscillating feedingplate, gate mechanism in such hopper to regulate the flow of material to such oscillating feeding-plate, an actuating-lever adj ustably connected with the oscillating feeding-plate and having its free end arranged under a movable part of the stamp, spring mechanism for thrusting forward the oscillating feeding-plate in opposition to the movements of the actuating-lever, an adjustable tappet-collar on a movable part of the stamp arranged to contact the actuating-lever, and an adj ustable set-screw to limit the range of action of the actuating lever, substantially as described.

PHILETUS WARREN GATES.

Witnesses:

HENRY WOODLAND, HERMAN M. VANcE. 

